﻿using System;
using System.Collections.Generic;
using System.Configuration;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace ZL.WeChatCard.Utility
{
    public class SMSHelper
    {
        private static readonly string DefaultUserAgent = "Mozilla/4.0 (compatible; MSIE 6.0; Windows NT 5.2; SV1; .NET CLR 1.1.4322; .NET CLR 2.0.50727)";

        public static string createRandom(bool numberFlag, int length)
        {
            string retStr = "";
            string strTable = numberFlag ? "1234567890" : "1234567890abcdefghijkmnpqrstuvwxyz";
            int len = strTable.Length;
            bool bDone = true;
            do
            {
                retStr = "";
                int count = 0;
                for (int i = 0; i < length; i++)
                {
                    int hashcode = Guid.NewGuid().GetHashCode();
                    Random sd=new Random(hashcode);
                    int intR = sd.Next(0, 9);
                    char c = strTable[intR];
                    if (('0' <= c) && (c <= '9'))
                    {
                        count++;
                    }
                    retStr += strTable[intR];
                }
                if (count >= 2)
                {
                    bDone = false;
                }
            } while (bDone);

            return retStr;
        }

        public static void SendValidateCode(string phone, string Code)
        {
            string SMSurl = ConfigurationManager.AppSettings["SMSurl"].ToString();
            string account=ConfigurationManager.AppSettings["SMSAccount"].ToString();
            string pswd=ConfigurationManager.AppSettings["SMSPwd"].ToString();
            Encoding encoding = Encoding.GetEncoding("utf-8");
            IDictionary<string, string> parameters = new Dictionary<string, string>();
            parameters.Add("account", account);
            parameters.Add("pswd", pswd);
            parameters.Add("mobile", phone);
            parameters.Add("msg", "您好，您的验证码是"+Code);
            parameters.Add("needstatus", "true");
            HttpWebResponse response = CreatePostHttpResponse(SMSurl, parameters, encoding);
            //打印返回值  
            Stream stream = response.GetResponseStream();   //获取响应的字符串流  
            StreamReader sr = new StreamReader(stream); //创建一个stream读取流  
            string html = sr.ReadToEnd();   //从头读到尾，放到字符串html  
            Console.WriteLine(html);
        }
        public static HttpWebResponse CreatePostHttpResponse(string url, IDictionary<string, string> parameters, Encoding charset)
        {
            HttpWebRequest request = null;
            //HTTPSQ请求  
            // ServicePointManager.ServerCertificateValidationCallback = new RemoteCertificateValidationCallback(CheckValidationResult);
            request = WebRequest.Create(url) as HttpWebRequest;
            request.ProtocolVersion = HttpVersion.Version11;
            request.Method = "POST";
            request.ContentType = "application/x-www-form-urlencoded";
            request.UserAgent = DefaultUserAgent;
            //如果需要POST数据     
            if (!(parameters == null || parameters.Count == 0))
            {
                StringBuilder buffer = new StringBuilder();
                int i = 0;
                foreach (string key in parameters.Keys)
                {
                    if (i > 0)
                    {
                        buffer.AppendFormat("&{0}={1}", key, parameters[key]);
                    }
                    else
                    {
                        buffer.AppendFormat("{0}={1}", key, parameters[key]);
                    }
                    i++;
                }
                byte[] data = charset.GetBytes(buffer.ToString());
                using (Stream stream = request.GetRequestStream())
                {
                    stream.Write(data, 0, data.Length);
                }
            }
            return request.GetResponse() as HttpWebResponse;
        }


        public static string HttpGet(string Url, string postDataStr)
        {
            HttpWebRequest request = (HttpWebRequest)WebRequest.Create(Url);
            request.Method = "GET";
            request.ContentType = "text/html;charset=UTF-8";

            HttpWebResponse response = (HttpWebResponse)request.GetResponse();
            Stream myResponseStream = response.GetResponseStream();
            StreamReader myStreamReader = new StreamReader(myResponseStream, Encoding.GetEncoding("utf-8"));
            string retString = myStreamReader.ReadToEnd();
            myStreamReader.Close();
            myResponseStream.Close();

            return retString;
        }

    }
}
